Pine Siskin

Spinus pinus

The pine siskin is a North American bird in the finch family. It is a migratory bird with an extremely sporadic winter range. Source

Where it is now

In the last 8 weeks this bird was recorded 1,811,263 times across 73 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 15°C (typically 3 to 21°C, from 39 areas). That range is wide, so temperature alone does not explain when it turns up.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.